App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 603 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 72 px tall
   Back button: 32 px tall
   Help button: 52 px tall (a) Next (b) Back (c) Help
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 68 px tall
   Back button: 64 px tall
   Start button: 28 px tall
   Save button: 56 px tall (a) Back (b) Save (c) Start (d) Send
6. 6.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) black on pale grey (d) dark blue on black
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
8. 8.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 64 px tall
   Next button: 56 px tall
   Done button: 56 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Help button: 60 px tall
    Next button: 32 px tall
11. 11.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) light grey on white (d) dark blue on white
12. 12.True or false: grey text on grey is good button design. (a) True (b) False
13. 13.True or false: a clear word like Save is good button design. (a) True (b) False
14. 14.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) black on yellow (d) dark blue on black
17. 17.True or false: buttons almost touching is poor button design. (a) False (b) True
18. 18.True or false: icons with no meaning is good button design. (a) True (b) False
19. 19.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) red on green (d) black on pale grey
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Send button: 56 px tall
    Done button: 60 px tall (a) Done (b) Send (c) Next
23. 23.True or false: a tiny 20 px button is poor button design. (a) False (b) True
24. 24.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on black (d) white on dark green
25. 25.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Cancel button: 48 px tall
    Back button: 72 px tall
    Next button: 52 px tall (a) Back (b) Help (c) Cancel (d) Next
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Cancel button: 56 px tall
    Send button: 24 px tall
    Save button: 68 px tall (a) Cancel (b) Send (c) Back (d) Save
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Cancel button: 40 px tall
    Help button: 48 px tall
    Next button: 36 px tall
31. 31.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.True or false: strong colour contrast is good button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Next button: 72 px tall
    Done button: 52 px tall (a) Send (b) Next (c) Done
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 28 px tall
    Save button: 72 px tall (a) Save (b) Help (c) Cancel
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Save button: 28 px tall
    Send button: 72 px tall (a) Back (b) Send (c) Save
38. 38.True or false: a tiny 20 px button is good button design. (a) False (b) True
39. 39.True or false: space between buttons is poor button design. (a) True (b) False
40. 40.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read

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